tag:blogger.com,1999:blog-7785493.post4632086324622279215..comments2015-04-01T00:37:44.149+03:00Comments on Dienekes’ Anthropology Blog: Eureka! African population structure contributing to signal of "Neandertal admixture"Dienekeshttp://www.blogger.com/profile/02082684850093948970noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7785493.post-8992433563086629132012-08-16T08:53:50.582+03:002012-08-16T08:53:50.582+03:00Nice analysis.
Another approach I have suggested ...Nice analysis.<br /><br />Another approach I have suggested before is to only take into consideration Neanderthal mutations (different from chimps) that are the same in Denisovans (we don&#39;t need to worry about Denisovan admixture in most of the Eurasian population). Such a D-statistic would rather mostly exclude the African admixture contribution, if any.eurologisthttp://www.blogger.com/profile/03440019181278830033noreply@blogger.comtag:blogger.com,1999:blog-7785493.post-83188860424407381462012-08-16T08:49:07.726+03:002012-08-16T08:49:07.726+03:00Could selection also be a plausible explanation? ...Could selection also be a plausible explanation? consider the mutation which causes sickle_cell anemia. Selection pressure from malaria keeps it present in Africa while it&#39;s deleterious effects eliminate it from populations with no threat from malaria.AndyChttp://www.blogger.com/profile/11073608165891123021noreply@blogger.comtag:blogger.com,1999:blog-7785493.post-90521058629151059412012-08-16T06:50:32.775+03:002012-08-16T06:50:32.775+03:00Just saw that my post above was a little confusing...Just saw that my post above was a little confusing. I was inspired by Dienekes&#39;s Eureka, mixed two schemata I had sketched and didn&#39;t proofread, but I think you get the picture.<br /><br />As for those who still wonder &quot;but why should admixture have been a bigger issue in Africa?&quot;, not sure (pop. density?). But, the evidence is there: unlike Eurasia, Africa has the &quot;smoking gun&quot; - VERY deep clades that undoubtedly predate the UP revolution and seem to stand apart from everyone else.aramthttp://www.blogger.com/profile/04486006044411081900noreply@blogger.comtag:blogger.com,1999:blog-7785493.post-31583584486484229252012-08-16T04:51:37.169+03:002012-08-16T04:51:37.169+03:00Consider this
*Denis-shift: no further admixture ...Consider this<br /><br />*Denis-shift: no further admixture with African AMH / Archaics after first OoA<br /><br />*Neander-shift: admixture in the ME and East Africa with specific groups of MH &amp; AMH / but no further admixture with African Archaics<br /><br />*African-shift: admixture across the boardaramthttp://www.blogger.com/profile/04486006044411081900noreply@blogger.comtag:blogger.com,1999:blog-7785493.post-42095541969008672792012-08-16T04:02:28.063+03:002012-08-16T04:02:28.063+03:00how does this explain denisova shift amongst melan...how does this explain denisova shift amongst melanesians?RedspanielChttp://www.blogger.com/profile/18157328500996133849noreply@blogger.com